Remove warning suppression in mocks

This commit removes the suppression of warnings in Servlet and Portlet
mocks since such suppression is no longer necessary with the upgrade to
version 3.0 of the Servlet specification.

Author: sbrannen

spring-test/src/main/java/org/springframework/mock/web/MockPageContext.java

@@ -253,7 +253,6 @@ public Enumeration<String> getAttributeNames() {
 		return Collections.enumeration(new LinkedHashSet<String>(this.attributes.keySet()));
 	}
 
-	@SuppressWarnings("unchecked")
 	public Enumeration<String> getAttributeNamesInScope(int scope) {
 		switch (scope) {
 			case PAGE_SCOPE:

spring-test/src/main/java/org/springframework/mock/web/portlet/ServletWrappingPortletContext.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2013 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -91,7 +91,6 @@ public String getRealPath(String path) {
 		return this.servletContext.getRealPath(path);
 	}
 
-	@SuppressWarnings("unchecked")
 	public Set<String> getResourcePaths(String path) {
 		return this.servletContext.getResourcePaths(path);
 	}
@@ -104,7 +103,6 @@ public Object getAttribute(String name) {
 		return this.servletContext.getAttribute(name);
 	}
 
-	@SuppressWarnings("unchecked")
 	public Enumeration<String> getAttributeNames() {
 		return this.servletContext.getAttributeNames();
 	}
@@ -113,7 +111,6 @@ public String getInitParameter(String name) {
 		return this.servletContext.getInitParameter(name);
 	}
 
-	@SuppressWarnings("unchecked")
 	public Enumeration<String> getInitParameterNames() {
 		return this.servletContext.getInitParameterNames();
 	}